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ID 114444
Author
Girase, Krunal Tokushima University
Wang, Zhenzhen Xi’an Jiaotong University|Tokushima University
Kamimoto, Takahiro Tokushima University
Jeon, Mingyu Korea Maritime and Ocean University
Cui, Minchao Northwestern Polytechnical University
Chou, Chen-Chia National Taiwan University of Science and Technology
Huang, Eddy National Taiwan University of Science and Technology
Keywords
Plasma Electrolytic Oxidation (PEO)
AZ91D Mg-alloy
Arc regime
Soft regime
Content Type
Journal Article
Description
The effect of bipolar pulse mode current ratio on plasma behavior was investigated in PEO on AZ91D Mg-Alloy. Two cases of current ratio including 1.20 and 0.88 were applied to the sample. Plasma emission behavior was studied using plasma images and plasma emission measured by photodetector and Intensified Charged-Couple Device (ICCD) camera. The current ratio of greater than 1 shows the continuous increase and then stabilization in emission intensity with a gradual increase in voltage throughout the PEO process. In contrast, the current ratio of less than 1, a sudden drop in plasma emission intensity with voltage was found after 786s. Therefore, PEO process can be divided into two regimes, arc regime and soft regime, before and after voltage drop respectively. Results of measured spectra show that a soft regime does not have atomic or ionic excitation during PEO process. It is demonstrated that the growth of porous layer during PEO can be controlled, which is benefit for the protective oxide coating of sample.
Journal Title
Modern Physics Letters B
ISSN
17936640
02179849
NCID
AA10672190
Publisher
World Scientific Publishing
Volume
34
Issue
07n09
Start Page
2040025
Published Date
2020-03-11
Rights
Electronic version of an article published as Modern Physics Letters B, Vol. 34, No. 07n09, 2020, 2040025, 10.1142/S0217984920400254 © World Scientific Publishing Company https://www.worldscientific.com/worldscinet/mplb
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DOI (Published Version)
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language
eng
TextVersion
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departments
Science and Technology